[linux.git] / include / asm-avr32 / processor.h

/*
 * Copyright (C) 2004-2006 Atmel Corporation
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#ifndef __ASM_AVR32_PROCESSOR_H
#define __ASM_AVR32_PROCESSOR_H

#include <asm/page.h>
#include <asm/cache.h>

#define TASK_SIZE	0x80000000

#ifndef __ASSEMBLY__

static inline void *current_text_addr(void)
{
	register void *pc asm("pc");
	return pc;
}

enum arch_type {
	ARCH_AVR32A,
	ARCH_AVR32B,
	ARCH_MAX
};

enum cpu_type {
	CPU_MORGAN,
	CPU_AT32AP,
	CPU_MAX
};

enum tlb_config {
	TLB_NONE,
	TLB_SPLIT,
	TLB_UNIFIED,
	TLB_INVALID
};

#define AVR32_FEATURE_RMW	(1 << 0)
#define AVR32_FEATURE_DSP	(1 << 1)
#define AVR32_FEATURE_SIMD	(1 << 2)
#define AVR32_FEATURE_OCD	(1 << 3)
#define AVR32_FEATURE_PCTR	(1 << 4)
#define AVR32_FEATURE_JAVA	(1 << 5)
#define AVR32_FEATURE_FPU	(1 << 6)

struct avr32_cpuinfo {
	struct clk *clk;
	unsigned long loops_per_jiffy;
	enum arch_type arch_type;
	enum cpu_type cpu_type;
	unsigned short arch_revision;
	unsigned short cpu_revision;
	enum tlb_config tlb_config;
	unsigned long features;
	u32 device_id;

	struct cache_info icache;
	struct cache_info dcache;
};

static inline unsigned int avr32_get_manufacturer_id(struct avr32_cpuinfo *cpu)
{
	return (cpu->device_id >> 1) & 0x7f;
}
static inline unsigned int avr32_get_product_number(struct avr32_cpuinfo *cpu)
{
	return (cpu->device_id >> 12) & 0xffff;
}
static inline unsigned int avr32_get_chip_revision(struct avr32_cpuinfo *cpu)
{
	return (cpu->device_id >> 28) & 0x0f;
}

extern struct avr32_cpuinfo boot_cpu_data;

#ifdef CONFIG_SMP
extern struct avr32_cpuinfo cpu_data[];
#define current_cpu_data cpu_data[smp_processor_id()]
#else
#define cpu_data (&boot_cpu_data)
#define current_cpu_data boot_cpu_data
#endif

/* This decides where the kernel will search for a free chunk of vm
 * space during mmap's
 */
#define TASK_UNMAPPED_BASE	(PAGE_ALIGN(TASK_SIZE / 3))

#define cpu_relax()		barrier()
#define cpu_sync_pipeline()	asm volatile("sub pc, -2" : : : "memory")

struct cpu_context {
	unsigned long sr;
	unsigned long pc;
	unsigned long ksp;	/* Kernel stack pointer */
	unsigned long r7;
	unsigned long r6;
	unsigned long r5;
	unsigned long r4;
	unsigned long r3;
	unsigned long r2;
	unsigned long r1;
	unsigned long r0;
};

/* This struct contains the CPU context as stored by switch_to() */
struct thread_struct {
	struct cpu_context cpu_context;
	unsigned long single_step_addr;
	u16 single_step_insn;
};

#define INIT_THREAD {						\
	.cpu_context = {					\
		.ksp = sizeof(init_stack) + (long)&init_stack,	\
	},							\
}

/*
 * Do necessary setup to start up a newly executed thread.
 */
#define start_thread(regs, new_pc, new_sp)	 \
	do {					 \
		set_fs(USER_DS);		 \
		memset(regs, 0, sizeof(*regs));	 \
		regs->sr = MODE_USER;		 \
		regs->pc = new_pc & ~1;		 \
		regs->sp = new_sp;		 \
	} while(0)

struct task_struct;

/* Free all resources held by a thread */
extern void release_thread(struct task_struct *);

/* Create a kernel thread without removing it from tasklists */
extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);

/* Prepare to copy thread state - unlazy all lazy status */
#define prepare_to_copy(tsk) do { } while(0)

/* Return saved PC of a blocked thread */
#define thread_saved_pc(tsk)    ((tsk)->thread.cpu_context.pc)

struct pt_regs;
extern unsigned long get_wchan(struct task_struct *p);
extern void show_regs_log_lvl(struct pt_regs *regs, const char *log_lvl);
extern void show_stack_log_lvl(struct task_struct *tsk, unsigned long sp,
			       struct pt_regs *regs, const char *log_lvl);

#define task_pt_regs(p) \
	((struct pt_regs *)(THREAD_SIZE + task_stack_page(p)) - 1)

#define KSTK_EIP(tsk)	((tsk)->thread.cpu_context.pc)
#define KSTK_ESP(tsk)	((tsk)->thread.cpu_context.ksp)

#define ARCH_HAS_PREFETCH

static inline void prefetch(const void *x)
{
	const char *c = x;
	asm volatile("pref %0" : : "r"(c));
}
#define PREFETCH_STRIDE	L1_CACHE_BYTES

#endif /* __ASSEMBLY__ */

#endif /* __ASM_AVR32_PROCESSOR_H */
Commit	Line	Data
5f97f7f9 HS	1	/*
	2	* Copyright (C) 2004-2006 Atmel Corporation
	3	*
	4	* This program is free software; you can redistribute it and/or modify
	5	* it under the terms of the GNU General Public License version 2 as
	6	* published by the Free Software Foundation.
	7	*/
	8	#ifndef __ASM_AVR32_PROCESSOR_H
	9	#define __ASM_AVR32_PROCESSOR_H
	10
	11	#include <asm/page.h>
	12	#include <asm/cache.h>
	13
	14	#define TASK_SIZE 0x80000000
	15
	16	#ifndef __ASSEMBLY__
	17
	18	static inline void *current_text_addr(void)
	19	{
	20	register void *pc asm("pc");
	21	return pc;
	22	}
	23
	24	enum arch_type {
	25	ARCH_AVR32A,
	26	ARCH_AVR32B,
	27	ARCH_MAX
	28	};
	29
	30	enum cpu_type {
	31	CPU_MORGAN,
	32	CPU_AT32AP,
	33	CPU_MAX
	34	};
	35
	36	enum tlb_config {
	37	TLB_NONE,
	38	TLB_SPLIT,
	39	TLB_UNIFIED,
	40	TLB_INVALID
	41	};
	42
3b328c98 HS	43	#define AVR32_FEATURE_RMW (1 << 0)
	44	#define AVR32_FEATURE_DSP (1 << 1)
	45	#define AVR32_FEATURE_SIMD (1 << 2)
	46	#define AVR32_FEATURE_OCD (1 << 3)
	47	#define AVR32_FEATURE_PCTR (1 << 4)
	48	#define AVR32_FEATURE_JAVA (1 << 5)
	49	#define AVR32_FEATURE_FPU (1 << 6)
	50
5f97f7f9 HS	51	struct avr32_cpuinfo {
	52	struct clk *clk;
	53	unsigned long loops_per_jiffy;
	54	enum arch_type arch_type;
	55	enum cpu_type cpu_type;
	56	unsigned short arch_revision;
	57	unsigned short cpu_revision;
	58	enum tlb_config tlb_config;
3b328c98	59	unsigned long features;
281ef58c	60	u32 device_id;
5f97f7f9 HS	61
	62	struct cache_info icache;
	63	struct cache_info dcache;
	64	};
	65
281ef58c HS	66	static inline unsigned int avr32_get_manufacturer_id(struct avr32_cpuinfo *cpu)
	67	{
	68	return (cpu->device_id >> 1) & 0x7f;
	69	}
	70	static inline unsigned int avr32_get_product_number(struct avr32_cpuinfo *cpu)
	71	{
	72	return (cpu->device_id >> 12) & 0xffff;
	73	}
	74	static inline unsigned int avr32_get_chip_revision(struct avr32_cpuinfo *cpu)
	75	{
	76	return (cpu->device_id >> 28) & 0x0f;
	77	}
	78
5f97f7f9 HS	79	extern struct avr32_cpuinfo boot_cpu_data;
	80
	81	#ifdef CONFIG_SMP
	82	extern struct avr32_cpuinfo cpu_data[];
	83	#define current_cpu_data cpu_data[smp_processor_id()]
	84	#else
	85	#define cpu_data (&boot_cpu_data)
	86	#define current_cpu_data boot_cpu_data
	87	#endif
	88
	89	/* This decides where the kernel will search for a free chunk of vm
	90	* space during mmap's
	91	*/
	92	#define TASK_UNMAPPED_BASE (PAGE_ALIGN(TASK_SIZE / 3))
	93
	94	#define cpu_relax() barrier()
	95	#define cpu_sync_pipeline() asm volatile("sub pc, -2" : : : "memory")
	96
	97	struct cpu_context {
	98	unsigned long sr;
	99	unsigned long pc;
	100	unsigned long ksp; /* Kernel stack pointer */
	101	unsigned long r7;
	102	unsigned long r6;
	103	unsigned long r5;
	104	unsigned long r4;
	105	unsigned long r3;
	106	unsigned long r2;
	107	unsigned long r1;
	108	unsigned long r0;
	109	};
	110
	111	/* This struct contains the CPU context as stored by switch_to() */
	112	struct thread_struct {
	113	struct cpu_context cpu_context;
	114	unsigned long single_step_addr;
	115	u16 single_step_insn;
	116	};
	117
	118	#define INIT_THREAD { \
	119	.cpu_context = { \
	120	.ksp = sizeof(init_stack) + (long)&init_stack, \
	121	}, \
	122	}
	123
	124	/*
	125	* Do necessary setup to start up a newly executed thread.
	126	*/
	127	#define start_thread(regs, new_pc, new_sp) \
	128	do { \
	129	set_fs(USER_DS); \
	130	memset(regs, 0, sizeof(*regs)); \
	131	regs->sr = MODE_USER; \
	132	regs->pc = new_pc & ~1; \
	133	regs->sp = new_sp; \
	134	} while(0)
	135
	136	struct task_struct;
	137
	138	/* Free all resources held by a thread */
	139	extern void release_thread(struct task_struct *);
	140
	141	/* Create a kernel thread without removing it from tasklists */
	142	extern int kernel_thread(int (fn)(void ), void *arg, unsigned long flags);
143
144	/* Prepare to copy thread state - unlazy all lazy status */
145	#define prepare_to_copy(tsk) do { } while(0)
146
147	/* Return saved PC of a blocked thread */
148	#define thread_saved_pc(tsk) ((tsk)->thread.cpu_context.pc)
149
150	struct pt_regs;
5f97f7f9	151	extern unsigned long get_wchan(struct task_struct *p);
623b0355 HS	152	extern void show_regs_log_lvl(struct pt_regs regs, const char log_lvl);
	153	extern void show_stack_log_lvl(struct task_struct *tsk, unsigned long sp,
	154	struct pt_regs regs, const char log_lvl);
5f97f7f9	155
2507bc13 HS	156	#define task_pt_regs(p) \
	157	((struct pt_regs *)(THREAD_SIZE + task_stack_page(p)) - 1)
	158
5f97f7f9 HS	159	#define KSTK_EIP(tsk) ((tsk)->thread.cpu_context.pc)
	160	#define KSTK_ESP(tsk) ((tsk)->thread.cpu_context.ksp)
	161
	162	#define ARCH_HAS_PREFETCH
	163
	164	static inline void prefetch(const void *x)
	165	{
	166	const char *c = x;
	167	asm volatile("pref %0" : : "r"(c));
	168	}
	169	#define PREFETCH_STRIDE L1_CACHE_BYTES
	170
	171	#endif /* __ASSEMBLY__ */
	172
	173	#endif /* __ASM_AVR32_PROCESSOR_H */